Apache HTTP Server
Servers & Server SoftwareApache HTTP Server is an open-source web server that delivers websites and web applications over HTTP and HTTPS. It handles incoming browser requests, maps them to files or application handlers, and returns responses such as HTML, images, or API output. Known for flexibility and broad compatibility, it supports modules, virtual hosts, and configuration via directives, making it common on shared, VPS, and dedicated hosting.
How It Works
Apache runs as a background service (daemon) on a server and listens for web traffic, typically on ports 80 (HTTP) and 443 (HTTPS). When a request arrives, Apache selects the correct site using name-based or IP-based virtual hosts, then processes the request through its core and optional modules. It can serve static files directly or pass dynamic requests to application runtimes (for example, PHP via PHP-FPM or a module) and then returns the generated response to the client.
Configuration is controlled through global settings (often in httpd.conf or apache2.conf) and per-site files, with many environments also allowing per-directory overrides using .htaccess. Modules extend capabilities such as URL rewriting (mod_rewrite), compression, caching, authentication, and proxying to upstream services. Apache supports multiple processing models (MPMs) that affect concurrency and resource usage, which can influence performance under high traffic.
Why It Matters for Web Hosting
Knowing whether a plan uses Apache helps you predict compatibility and control. Many applications and tutorials assume Apache features like .htaccess rules, mod_rewrite, and directory-level configuration, which can simplify migrations and troubleshooting. When comparing hosting plans, Apache-related factors to check include support for .htaccess, available modules, PHP handling method (module vs PHP-FPM), TLS configuration options, and whether you can edit virtual host settings on VPS or dedicated servers.
Common Use Cases
- Shared hosting environments that rely on .htaccess for per-site rules
- Hosting PHP applications that need URL rewriting, access control, or custom headers
- Running multiple websites on one server using virtual hosts
- Reverse proxying or load-balancing to application servers via proxy modules
- Serving static and dynamic content on VPS or dedicated servers with fine-grained configuration
Apache HTTP Server vs Nginx
Apache and Nginx both serve web traffic, but they differ in configuration style and common deployment patterns. Apache is often chosen for its mature module ecosystem and .htaccess support, which enables directory-level overrides without editing central configs. Nginx typically emphasizes event-driven concurrency and is frequently used as a high-performance reverse proxy in front of application servers. For hosting buyers, the practical difference is usually whether you need .htaccess compatibility and how much server-level control your plan provides.